Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christian Joseph Wesolowski

Dentist in Waltham, MA · enumerated 2023.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1295428878

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Registry record

Entity type Individual (Type 1)

Name Christian Joseph Wesolowski

Sex Male

Practice address 131 Main St, Waltham, MA, 02453

Phone (781) 893-7500

Enumeration date May 31, 2023

Last updated in NPPES May 31, 2023

Taxonomy & licenses

122300000X Dentist Dental Providers · License DN1859755 (MA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Christian Wesolowski?

Christian Wesolowski is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-31.